490
FNCA52 TJSJ 211930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST TUE JUL 21 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-220800-
SOUTHEAST COASTAL PLAINS-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 40 40 0
TEMP (24H TREND) 73 (-2) 92 (+1) 73 90
RH % (24H TREND) 94 (+6) 48 (-11) 89 44
WIND 20FT/EARLY(MPH) NE 14 E 12 E 11 E 16
WIND 20FT/LATE(MPH) NE 9 SE 12 E 10 SE 16
MIXING HGT(FT-AGL/MSL) 4760 5530
TRANSPORT WND (MPH) SE 14 SE 16
VENT RATE (KT-FT) 57120 77420
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-220800-
SOUTHERN HILLS-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20 0
TEMP (24H TREND) 69 (-3) 88 (+2) 70 87
RH % (24H TREND) 99 (+6) 60 (-6) 97 59
WIND 20FT/EARLY(MPH) NE 12 SE 11 E 11 E 12
WIND 20FT/LATE(MPH) NE 9 SE 11 E 11 SE 12
MIXING HGT(FT-AGL/MSL) 5620 6280
TRANSPORT WND (MPH) SE 14 SE 15
VENT RATE (KT-FT) 67440 81640
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-220800-
NORTH COASTAL PLAINS-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 10 10
TEMP (24H TREND) 73 (-2) 93 (+5) 72 91
RH % (24H TREND) 100 (+8) 56 (-13) 98 58
WIND 20FT/EARLY(MPH) E 14 E 12 E 14 E 13
WIND 20FT/LATE(MPH) E 11 E 18 SE 11 E 18
MIXING HGT(FT-AGL/MSL) 5770 6490
TRANSPORT WND (MPH) SE 13 E 16
VENT RATE (KT-FT) 63470 90860
DISPERSION 5 5
DSI 5 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-220800-
NORTHERN HILLS-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 80 0 20
TEMP (24H TREND) 71 (-2) 91 (+5) 70 90
RH % (24H TREND) 100 (+4) 62 (-8) 99 61
WIND 20FT/EARLY(MPH) E 13 E 11 SE 12 E 12
WIND 20FT/LATE(MPH) E 10 E 16 E 9 E 14
MIXING HGT(FT-AGL/MSL) 6580 7610
TRANSPORT WND (MPH) SE 10 SE 13
VENT RATE (KT-FT) 59220 83710
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-220800-
WEST COAST-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 40 10 30
TEMP (24H TREND) 72 (-1) 94 (+3) 73 91
RH % (24H TREND) 100 (+4) 58 (-7) 98 58
WIND 20FT/EARLY(MPH) NE 16 SE 13 SE 13 E 12
WIND 20FT/LATE(MPH) E 14 SE 14 E 12 E 13
MIXING HGT(FT-AGL/MSL) 4710 5550
TRANSPORT WND (MPH) SE 13 E 12
VENT RATE (KT-FT) 51810 55500
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-220800-
EASTERN INTERIOR-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30 10
TEMP (24H TREND) 71 (-3) 92 (+5) 71 89
RH % (24H TREND) 100 (+7) 55 (-10) 97 58
WIND 20FT/EARLY(MPH) NE 12 SE 13 SE 13 SE 13
WIND 20FT/LATE(MPH) E 10 SE 14 SE 13 SE 13
MIXING HGT(FT-AGL/MSL) 6520 6750
TRANSPORT WND (MPH) SE 16 SE 17
VENT RATE (KT-FT) 91280 101250
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-220800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40 10
TEMP (24H TREND) 69 (-3) 86 (+4) 69 85
RH % (24H TREND) 100 (+4) 63 (-10) 100 65
WIND 20FT/EARLY(MPH) NE 9 SE 11 SE 10 SE 11
WIND 20FT/LATE(MPH) E 8 SE 12 SE 10 SE 12
MIXING HGT(FT-AGL/MSL) 4610 5120
TRANSPORT WND (MPH) SE 16 SE 18
VENT RATE (KT-FT) 64540 81920
DISPERSION 5 5
DSI 4 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-220800-
CENTRAL MOUNTAIN RANGE-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 0 60 0 10
TEMP (24H TREND) 67 (-3) 88 (+6) 67 86
RH % (24H TREND) 100 (+3) 68 (-7) 99 66
WIND 20FT/EARLY(MPH) NE 12 SE 10 SE 8 E 10
WIND 20FT/LATE(MPH) E 10 SE 10 E 8 SE 10
MIXING HGT(FT-AGL/MSL) 6850 7790
TRANSPORT WND (MPH) SE 12 SE 12
VENT RATE (KT-FT) 68500 77900
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-220800-
CAYEY MOUNTAIN RANGE-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 40 10
TEMP (24H TREND) 70 (-1) 86 (+2) 70 84
RH % (24H TREND) 100 (+3) 65 (-2) 99 67
WIND 20FT/EARLY(MPH) NE 11 SE 10 E 9 E 11
WIND 20FT/LATE(MPH) E 6 SE 10 E 9 SE 11
MIXING HGT(FT-AGL/MSL) 5090 5820
TRANSPORT WND (MPH) SE 15 SE 17
VENT RATE (KT-FT) 66170 87300
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-220800-
VIEQUES-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 60 40 10
TEMP (24H TREND) 78 (0) 91 (+2) 77 90
RH % (24H TREND) 87 (+5) 53 (-9) 84 56
WIND 20FT/EARLY(MPH) E 13 SE 16 E 16 E 16
WIND 20FT/LATE(MPH) E 14 SE 13 E 16 E 14
MIXING HGT(FT-AGL/MSL) 3520 4090
TRANSPORT WND (MPH) SE 17 SE 18
VENT RATE (KT-FT) 52800 65440
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-220800-
CULEBRA-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40 20
TEMP (24H TREND) 77 (-2) 92 (+4) 77 90
RH % (24H TREND) 90 (+6) 56 (-11) 88 58
WIND 20FT/EARLY(MPH) E 12 SE 16 E 17 E 16
WIND 20FT/LATE(MPH) E 14 SE 14 E 17 E 16
MIXING HGT(FT-AGL/MSL) 3490 3790
TRANSPORT WND (MPH) SE 18 E 21
VENT RATE (KT-FT) 55840 68220
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-220800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 30 10
TEMP (24H TREND) 73 (-1) 93 (+3) 74 92
RH % (24H TREND) 96 (+6) 47 (-12) 91 48
WIND 20FT/EARLY(MPH) E 17 E 18 E 17 E 18
WIND 20FT/LATE(MPH) E 13 SE 19 E 17 SE 19
MIXING HGT(FT-AGL/MSL) 4690 5330
TRANSPORT WND (MPH) SE 16 E 18
VENT RATE (KT-FT) 65660 85280
DISPERSION 5 5
DSI 2 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-220800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 40 20
TEMP (24H TREND) 76 (-3) 89 (+3) 77 87
RH % (24H TREND) 90 (+5) 59 (-9) 89 60
WIND 20FT/EARLY(MPH) E 12 SE 16 E 17 E 16
WIND 20FT/LATE(MPH) E 16 SE 14 E 17 E 16
MIXING HGT(FT-AGL/MSL) 3550 3720
TRANSPORT WND (MPH) SE 18 SE 21
VENT RATE (KT-FT) 56800 66960
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-220800-
ST CROIX-
330 PM AST TUE JUL 21 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 40 20
TEMP (24H TREND) 77 (-2) 91 (+4) 77 88
RH % (24H TREND) 91 (+4) 57 (-10) 87 60
WIND 20FT/EARLY(MPH) E 12 SE 16 E 14 E 17
WIND 20FT/LATE(MPH) E 14 SE 14 E 16 E 17
MIXING HGT(FT-AGL/MSL) 4950 4810
TRANSPORT WND (MPH) SE 15 E 22
VENT RATE (KT-FT) 64350 91390
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page